mikebeargie offered exact steps to create a button. I'd recommend to check out the FileMaker Training Series to get started. The Basics is free and is great for learning where everything is located and all of the "basic" features.

The trial will be permanently expired for that particular computer. You are able to install the trial for an additional 15 days on a different computer. I am also sending you a private message with further details.

The first screen only has one field, which is non-table field. There is no

table associated with the first screen.

No such field exists in FileMaker. Every field must be defined in a table. But you can use a field with global storage specified.

But where do I create the scripts and how do I attach a script to an object

on the screen? This is something so simple that I'm missing it.

Scripts are created in the scripts workspace. You can get to the scripts workspace from the Scritps Menu, from button setup, when creating a button or by setting up a script trigger on a layout object such as the field object or a few other objects. Script triggers can be set on layouts and windows as well.

If you want to set a script trigger on a field, right click it, select script trigger, select the type of trigger and click "Specify", this gets you to the same dialog as 3. above.